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Add flag for generating gqlgen marshaling methods

This commit is contained in:
Kiril Vladimiroff 2020-09-18 16:34:49 +03:00 committed by Kiril Vladimirov
parent 67fb6efca7
commit 67e4e9619f
4 changed files with 219 additions and 15 deletions
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55
golden_test.go
View File

@ -48,6 +48,10 @@ var goldenSQL = []Golden{
{"primeSql", primeSqlIn},
}
var goldenGQLGen = []Golden{
{"primeGQLGen", primeGQLGenIn},
}
var goldenJSONAndSQL = []Golden{
{"primeJsonAndSql", primeJsonAndSqlIn},
}
@ -235,6 +239,25 @@ const (
)
`
const primeGQLGenIn = `type Prime int
const (
p2 Prime = 2
p3 Prime = 3
p5 Prime = 5
p7 Prime = 7
p77 Prime = 7 // Duplicate; note that p77 doesn't appear below.
p11 Prime = 11
p13 Prime = 13
p17 Prime = 17
p19 Prime = 19
p23 Prime = 23
p29 Prime = 29
p37 Prime = 31
p41 Prime = 41
p43 Prime = 43
)
`
const primeJsonAndSqlIn = `type Prime int
const (
p2 Prime = 2
@ -292,41 +315,47 @@ const (
func TestGolden(t *testing.T) {
for _, test := range golden {
runGoldenTest(t, test, false, false, false, false, false, "", "")
runGoldenTest(t, test, false, false, false, false, false, false, "", "")
}
for _, test := range goldenJSON {
runGoldenTest(t, test, true, false, false, false, false, "", "")
runGoldenTest(t, test, true, false, false, false, false, false, "", "")
}
for _, test := range goldenText {
runGoldenTest(t, test, false, false, false, true, false, "", "")
runGoldenTest(t, test, false, false, false, true, false, false, "", "")
}
for _, test := range goldenYAML {
runGoldenTest(t, test, false, true, false, false, false, "", "")
runGoldenTest(t, test, false, true, false, false, false, false, "", "")
}
for _, test := range goldenSQL {
runGoldenTest(t, test, false, false, true, false, false, "", "")
runGoldenTest(t, test, false, false, true, false, false, false, "", "")
}
for _, test := range goldenJSONAndSQL {
runGoldenTest(t, test, true, false, true, false, false, "", "")
runGoldenTest(t, test, true, false, true, false, false, false, "", "")
}
for _, test := range goldenGQLGen {
runGoldenTest(t, test, false, false, false, false, false, true, "", "")
}
for _, test := range goldenTrimPrefix {
runGoldenTest(t, test, false, false, false, false, false, "Day", "")
runGoldenTest(t, test, false, false, false, false, false, false, "Day", "")
}
for _, test := range goldenTrimPrefixMultiple {
runGoldenTest(t, test, false, false, false, false, false, "Day,Night", "")
runGoldenTest(t, test, false, false, false, false, false, false, "Day,Night", "")
}
for _, test := range goldenWithPrefix {
runGoldenTest(t, test, false, false, false, false, false, "", "Day")
runGoldenTest(t, test, false, false, false, false, false, false, "", "Day")
}
for _, test := range goldenTrimAndAddPrefix {
runGoldenTest(t, test, false, false, false, false, false, "Day", "Night")
runGoldenTest(t, test, false, false, false, false, false, false, "Day", "Night")
}
for _, test := range goldenLinecomment {
runGoldenTest(t, test, false, false, false, false, true, "", "")
runGoldenTest(t, test, false, false, false, false, true, false, "", "")
}
}
func runGoldenTest(t *testing.T, test Golden, generateJSON, generateYAML, generateSQL, generateText, linecomment bool, trimPrefix string, prefix string) {
func runGoldenTest(t *testing.T, test Golden,
generateJSON, generateYAML, generateSQL, generateText, linecomment, generateGQLGen bool,
trimPrefix string, prefix string) {
var g Generator
file := test.name + ".go"
input := "package test\n" + test.input
@ -353,7 +382,7 @@ func runGoldenTest(t *testing.T, test Golden, generateJSON, generateYAML, genera
if len(tokens) != 3 {
t.Fatalf("%s: need type declaration on first line", test.name)
}
g.generate(tokens[1], generateJSON, generateYAML, generateSQL, generateText, "noop", trimPrefix, prefix, linecomment)
g.generate(tokens[1], generateJSON, generateYAML, generateSQL, generateText, generateGQLGen, "noop", trimPrefix, prefix, linecomment)
got := string(g.format())
if got != loadGolden(test.name) {
// Use this to help build a golden text when changes are needed

26
gqlgen.go Normal file
View File

@ -0,0 +1,26 @@
package main
// Arguments to format are:
// [1]: type name
const gqlgenMethods = `
// MarshalGQL implements the graphql.Marshaler interface for %[1]s
func (i %[1]s) MarshalGQL(w io.Writer) {
fmt.Fprint(w, strconv.Quote(i.String()))
}
// UnmarshalGQL implements the graphql.Unmarshaler interface for %[1]s
func (i *%[1]s) UnmarshalGQL(value interface{}) error {
str, ok := value.(string)
if !ok {
return fmt.Errorf("%[1]s should be a string, got %%T", value)
}
var err error
*i, err = %[1]sString(str)
return err
}
`
func (g *Generator) buildGQLGenMethods(runs [][]Value, typeName string) {
g.Printf(gqlgenMethods, typeName)
}

13
stringer.go
View File

@ -49,6 +49,7 @@ var (
json = flag.Bool("json", false, "if true, json marshaling methods will be generated. Default: false")
yaml = flag.Bool("yaml", false, "if true, yaml marshaling methods will be generated. Default: false")
text = flag.Bool("text", false, "if true, text marshaling methods will be generated. Default: false")
gqlgen = flag.Bool("gqlgen", false, "if true, GraphQL marshaling methods for gqlgen will be generated. Default: false")
output = flag.String("output", "", "output file name; default srcdir/<type>_string.go")
transformMethod = flag.String("transform", "noop", "enum item name transformation method. Default: noop")
trimPrefix = flag.String("trimprefix", "", "transform each item name by removing a prefix. Default: \"\"")
@ -125,11 +126,15 @@ func main() {
if *json {
g.Printf("\t\"encoding/json\"\n")
}
if *gqlgen {
g.Printf("\t\"io\"\n")
g.Printf("\t\"strconv\"\n")
}
g.Printf(")\n")
// Run generate for each type.
for _, typeName := range typs {
g.generate(typeName, *json, *yaml, *sql, *text, *transformMethod, *trimPrefix, *addPrefix, *linecomment)
g.generate(typeName, *json, *yaml, *sql, *text, *gqlgen, *transformMethod, *trimPrefix, *addPrefix, *linecomment)
}
// Format the output.
@ -407,7 +412,8 @@ func (g *Generator) prefixValueNames(values []Value, prefix string) {
}
// generate produces the String method for the named type.
func (g *Generator) generate(typeName string, includeJSON, includeYAML, includeSQL, includeText bool,
func (g *Generator) generate(typeName string,
includeJSON, includeYAML, includeSQL, includeText, includeGQLGen bool,
transformMethod string, trimPrefix string, addPrefix string, lineComment bool) {
values := make([]Value, 0, 100)
for _, file := range g.pkg.files {
@ -470,6 +476,9 @@ func (g *Generator) generate(typeName string, includeJSON, includeYAML, includeS
if includeSQL {
g.addValueAndScanMethod(typeName)
}
if includeGQLGen {
g.buildGQLGenMethods(runs, typeName)
}
}
// splitIntoRuns breaks the values into runs of contiguous sequences.

140
testdata/primeGQLGen.golden vendored Normal file
View File

@ -0,0 +1,140 @@
const _PrimeName = "p2p3p5p7p11p13p17p19p23p29p37p41p43"
const _PrimeLowerName = "p2p3p5p7p11p13p17p19p23p29p37p41p43"
var _PrimeMap = map[Prime]string{
2: _PrimeName[0:2],
3: _PrimeName[2:4],
5: _PrimeName[4:6],
7: _PrimeName[6:8],
11: _PrimeName[8:11],
13: _PrimeName[11:14],
17: _PrimeName[14:17],
19: _PrimeName[17:20],
23: _PrimeName[20:23],
29: _PrimeName[23:26],
31: _PrimeName[26:29],
41: _PrimeName[29:32],
43: _PrimeName[32:35],
}
func (i Prime) String() string {
if str, ok := _PrimeMap[i]; ok {
return str
}
return fmt.Sprintf("Prime(%d)", i)
}
// An "invalid array index" compiler error signifies that the constant values have changed.
// Re-run the stringer command to generate them again.
func _PrimeNoOp() {
var x [1]struct{}
_ = x[p2-(2)]
_ = x[p3-(3)]
_ = x[p5-(5)]
_ = x[p7-(7)]
_ = x[p11-(11)]
_ = x[p13-(13)]
_ = x[p17-(17)]
_ = x[p19-(19)]
_ = x[p23-(23)]
_ = x[p29-(29)]
_ = x[p37-(31)]
_ = x[p41-(41)]
_ = x[p43-(43)]
}
var _PrimeValues = []Prime{p2, p3, p5, p7, p11, p13, p17, p19, p23, p29, p37, p41, p43}
var _PrimeNameToValueMap = map[string]Prime{
_PrimeName[0:2]: p2,
_PrimeLowerName[0:2]: p2,
_PrimeName[2:4]: p3,
_PrimeLowerName[2:4]: p3,
_PrimeName[4:6]: p5,
_PrimeLowerName[4:6]: p5,
_PrimeName[6:8]: p7,
_PrimeLowerName[6:8]: p7,
_PrimeName[8:11]: p11,
_PrimeLowerName[8:11]: p11,
_PrimeName[11:14]: p13,
_PrimeLowerName[11:14]: p13,
_PrimeName[14:17]: p17,
_PrimeLowerName[14:17]: p17,
_PrimeName[17:20]: p19,
_PrimeLowerName[17:20]: p19,
_PrimeName[20:23]: p23,
_PrimeLowerName[20:23]: p23,
_PrimeName[23:26]: p29,
_PrimeLowerName[23:26]: p29,
_PrimeName[26:29]: p37,
_PrimeLowerName[26:29]: p37,
_PrimeName[29:32]: p41,
_PrimeLowerName[29:32]: p41,
_PrimeName[32:35]: p43,
_PrimeLowerName[32:35]: p43,
}
var _PrimeNames = []string{
_PrimeName[0:2],
_PrimeName[2:4],
_PrimeName[4:6],
_PrimeName[6:8],
_PrimeName[8:11],
_PrimeName[11:14],
_PrimeName[14:17],
_PrimeName[17:20],
_PrimeName[20:23],
_PrimeName[23:26],
_PrimeName[26:29],
_PrimeName[29:32],
_PrimeName[32:35],
}
// PrimeString retrieves an enum value from the enum constants string name.
// Throws an error if the param is not part of the enum.
func PrimeString(s string) (Prime, error) {
if val, ok := _PrimeNameToValueMap[s]; ok {
return val, nil
}
s = strings.ToLower(s)
if val, ok := _PrimeNameToValueMap[s]; ok {
return val, nil
}
return 0, fmt.Errorf("%s does not belong to Prime values", s)
}
// PrimeValues returns all values of the enum
func PrimeValues() []Prime {
return _PrimeValues
}
// PrimeStrings returns a slice of all String values of the enum
func PrimeStrings() []string {
strs := make([]string, len(_PrimeNames))
copy(strs, _PrimeNames)
return strs
}
// IsAPrime returns "true" if the value is listed in the enum definition. "false" otherwise
func (i Prime) IsAPrime() bool {
_, ok := _PrimeMap[i]
return ok
}
// MarshalGQL implements the graphql.Marshaler interface for Prime
func (i Prime) MarshalGQL(w io.Writer) {
fmt.Fprint(w, strconv.Quote(i.String()))
}
// UnmarshalGQL implements the graphql.Unmarshaler interface for Prime
func (i *Prime) UnmarshalGQL(value interface{}) error {
str, ok := value.(string)
if !ok {
return fmt.Errorf("Prime should be a string, got %T", value)
}
var err error
*i, err = PrimeString(str)
return err
}